THIGMOTAXIS
Etymology
Noun
thigmotaxis (uncountable)
(biology) The movement of an organism either towards or away from the stimulus of physical contact.
Source: Wiktionary
Thig`mo*tax"is, n. [NL., fr. Gr. touch + an arranging.] (Physiol.)
Definition: The property possessed by living protoplasm of contracting, and
thus moving, when touched by a solid or fluid substance.
When the movement is away from the touching body, it is negative
thigmotaxis; when towards it, positive thigmotaxis.
Source: Webster’s Unabridged Dictionary 1913 Edition